Hello Jumpyjan...glad you feeling a bit better today. My DH works away in the week too and there are good and bad bits about it...like everything really.
It is obviously hard for you at the minute as it is a new thing but you will get used to it.
Before i had DS then i used to do my own thing int he week, sports, girly nights etc and then the weekends are ususally more jsut us. Since DS obvioulsy i cant go out the same way unless i get a babaysitter which isnt really worth the faff.
I would say try and look at it positively...the good things are:
it is only actually 4 days that you dont see him if he is back on a friday.
Use the week to do things you like doing...watching trashy girly tv or whatever...eating what you want...ie you can have rice krispies for tea if you want to. Plus he can do boy stuff in the week...footie etc
On the weekends i would say dont arrange stuff with friends or going away type things every week, make sure you have lots of time that is just you three. Just pottering around the house or garden can be lovely.
With regards to your DD you will soon find that your DH has excellent novelty factor and she will be so happy to see him when he comes home. My DS (19 months) has no problems with him being away and is delirious when he is away. Also if you dont already, make sure you let your DH take over the baby stuff a bit at weekeends...changing, bath etc. Dont stand over him telling him how to do it right even if you think he's doing it 'wrong'. just cos he does things differently doesnt make it wrong IYSWIM. I think then you get a well needed break and he gets time with your dd.
The novelty factor appiles to you too....tis much easier to be appreciative of someone you dont see every day, less chance of a rut when you dont have the everyday drudge to niggle each other about.
Also try and remember that even if your DH didn't work away the actual time spent with DD (especially as she gets older) might not be much different. My DH had a job for a year working 26 miles away but he still ahd to be out of the house by 7:10 am and didnt get home til nearly 7 pm...DSnow in bed by 7 so in actual fact it is v. similar.
One other thing...is your DH able to work flexi hours to some extent...mine works v. long days all week but finishes at lunchtime on a friday so is back home by 3-pm on a fri.
Blimey sorry just realised what a long waffle that is!